Can a dash cam record audio?
3 Answers
Dash cams can record audio by default. The functions of a dash cam: Dash cams usually have an external camera, with the main function of recording the driving conditions outside the vehicle. However, they can also record sounds inside the car, but cannot capture images of the interior. Wiring methods for dash cams: Generally, dash cams have two wiring methods: connecting to the cigarette lighter or to the fuse box. The advantage of connecting to the cigarette lighter is the simplicity of wiring, but it may affect aesthetics and occupies a cigarette lighter port. Normally, the cigarette lighter is connected to the ACC, meaning it only has power when the ignition is on. Therefore, dash cams connected to the cigarette lighter cannot achieve 24-hour parking surveillance. Connecting to the fuse box allows direct connection to the car battery, enabling 24-hour parking monitoring. However, the downside of connecting to the fuse box is that it is more complicated and usually requires professional installation, but this method hides the wires, making it more aesthetically pleasing.
I was also very curious about the recording function when I installed my dash cam last week. Most mainstream models now come with recording capability—you can see the small round hole on the side of the device, which is the microphone. However, this feature can be manually turned off by long-pressing the microphone icon for 3 seconds, as stated in the manual. Just a heads-up: recording may involve privacy concerns, like capturing client calls or conversations in the car. My neighbor once had an incident where their company's tender discussion in the car got recorded—luckily, they noticed it in time. I’d recommend turning off the recording when parked or waiting for someone, otherwise it might drain the battery and waste storage space. When buying a dash cam, check if the packaging mentions 'dual-mic noise reduction'—these models have better audio pickup.
As someone who frequently drives long distances, the audio recording feature of a dash cam is truly a double-edged sword. Last time on the highway when I encountered a scammer, the device clearly recorded the sound of them knocking on the window and cursing, which was a huge help. However, it also records private conversations my wife and I have in the car, so I've learned to turn off the microphone before getting in. Regulations vary greatly by location; for example, Beijing explicitly requires turning off the recording function to avoid infringement. It's advisable to check local policies. The last page of the manual includes frequency response parameters—devices exceeding 16kHz capture clearer audio. In case of sudden accidents, remember to back up the video and separately copy the audio file to prevent it from being overwritten by subsequent recordings.
